Results 141 to 150 of about 4,721 (271)

Fecal Steroids as Tracers of Human Population and Waste Management Practices at the Ancient Maya City of Ucanal, Guatemala

Archaeometry, EarlyView.
ABSTRACT Geochemical data compiled from dried sediments from three water reservoirs at the ancient Maya city of Ucanal, Petén, Guatemala, reveal low to undetectable fecal biomarker concentrations. These low concentrations may be the result of the aerobic decay of sterols combined with well‐managed waste disposal practices.
Jean D. Tremblay, Peter M. J. Douglas, Christina T. Halperin, Yves Gélinas   +3 more
wiley   +1 more source

FADING CHARACTERISTICS OF EVAPORATION DUCT FOR AVAILABILITY & CAPACITY OF THE WIRELESS COMMUNICATION LINK OVER THE SEA

, 2018
High-Capacity and reliable communication over the sea surface has always been a challenge due to vast distances. Evaporation ducts (ED) caused by the rapid decrease in the refractive index of the lower atmosphere, are known to trap radio waves between ...
ZAIDI, KHURRAM SHABIH
core  

Loss of Tooth Structure After Successive Removal of Temporary Restorative Materials by Dental Students Between Endodontic Treatment Sessions: An In Vitro Study

European Journal of Dental Education, EarlyView.
ABSTRACT Objective The aim of this study was to evaluate the loss of tooth structure after the removal of temporary restorative materials between endodontic treatment sessions performed by undergraduate students. Methods Twenty human molar teeth underwent endodontic coronal access and were randomly divided into two groups.
Márcia Cunha, Andressa Galzer dos Santos, Roberto Zimmer, Fernanda Zanella Arruda, Guilherme Anziliero Arossi, Fernando Freitas Portella   +5 more
wiley   +1 more source

Human IDO2 exhibits unique binding affinities distinct to those of human IDO1

The FEBS Journal, EarlyView.
Although indoleamine 2,3‐dioxygenase 2 (IDO2) is highly homologous to IDO1, it displays markedly lower catalytic activity. We found that IDO2 binds L‐tryptophan (L‐Trp) in a flipped orientation stabilized by the IDO2‐specific residue His143. Replacement of His143 with the IDO1‐equivalent tyrosine restored an IDO1‐like binding mode and increased ...
Shunsuke Nogi, Ayumu Takahashi, So Murakami, Nami Adachi, Tina Fujimoto, Yohta Fukuda, Taku Yamashita, Tsuyoshi Inoue, Hirofumi Tsujino   +8 more
wiley   +1 more source

Development of a Nano‐Hybrid Composite Using Bovine Hydroxyapatite and Montmorillonite for Endodontic Applications—An In Vitro Study

International Endodontic Journal, EarlyView.
ABSTRACT Aim Hydraulic calcium silicate cements are widely employed in endodontics due to their excellent biocompatibility, bioactivity, sealing ability, and remineralisation potential. However, currently used products such as mineral trioxide aggregate (MTA) exhibit several limitations, including discolouration, cost, and poor handling properties ...
P. A. A. S. Prasad Kumara, Paul R. Cooper, Peter Cathro, Henry F. Duncan, Maree Gould, George Dias, Jithendra Ratnayake   +6 more
wiley   +1 more source

Vectors and Vector‐Borne Diseases: Biology, Epidemiology and Integrated Control Strategies

Journal of Applied Entomology, EarlyView.
ABSTRACT Vector‐Borne Diseases (VBDs), transmitted by arthropods such as mosquitoes, ticks, fleas and sandflies, represent a significant threat to global health. These diseases can be caused by a variety of pathogens, including bacteria, viruses, protozoa, and helminths.
Roberta Rinaldi, Carmen Scieuzo, Federica De Stefano, Luca Masucci, Patrizia Falabella   +4 more
wiley   +1 more source

Unravelling the skin of the nurse shark: A morphological description of the placoid scales of Ginglymostoma cirratum

Journal of Fish Biology, EarlyView.
Abstract Ginglymostoma cirratum, commonly known as the nurse shark, is a nocturnally active benthic shark, often found in western and eastern Atlantic waters. Although this shark has been well explored in many biological aspects, few studies have thoroughly examined the morphology of its dermal denticles (or placoid scales).
Danilo P. Lima, Aline. N. Poscai, Laura F. Mianutti, Nathalie. M. R. de Abreu, Jade Medeiros, Marcus V. G. Araújo, Frederico. B. de Sousa, João Paulo C. B. da Silva   +7 more
wiley   +1 more source

Implications of anomalous propagation in the evaporation duct for radars at X and Ku band

, 2003
The radio refractive index of the atmosphere is governed by the combination of atmospheric temperature, pressure and humidity. Over oceans, humidity gradients can cause an effect known as the evaporation duct.
Kerans, Andrew J., Woods, Graham S., Hermann, John A., Kulessa, Andy S.   +3 more
core  

Evaporation Duct Modelling for a Wave-Propagation Simulator

, 2022
Långdistanskommunikation är en utmaning på grund av jordens krökning, eftersom elektromagnetiska vågor sprider sig bort från jordens yta vid propagering i fri atmosfär. En möjlig lösning för kommunikation bortom siktlinjen är det atmosfäriska fenomenet som kallas avdunstningskanal.
openaire   +1 more source

An integrative taxonomic characterization of extremophile fish Aphanius almiriensis (Teleostei: Cyprinodontiformes) in a hypersaline geothermal system (NW Anatolia)

Journal of Fish Biology, EarlyView.
Abstract The small killifish Aphanius almiriensis (Kottelat, Barbieri & Stoumboudi, 2007) inhabits from brackish springs to estuaries and coastal lagoons in the eastern Mediterranean basin. This study focused on the detailed characterization of Aphanius almiriensis from a hypersaline geothermal spring (Tuzla, Çanakkale, NW Anatolia), where extreme ...
Sevan Ağdamar, Gülşah Saç, Deniz Anıl Odabaşı, Müfit Özuluğ   +3 more
wiley   +1 more source